CHAPTER 1. SKILLS FOR SCIENCE 1.5
use your hand to gently waft (fan) the vapours towards you.
15. Do not take chemicals from the laboratory.
16. Always work in a well ventilated room. Whenever you perform experiments, you
should open the windows.
17. Do not leave Bunsen burners and flames unattended.
18. Never smell, taste or touch chemicals unless instructed to do so.
19. Never point test tubes at people or yourself. When heating chemicals, always point
the mouth of the test tube away from you and your classmates.Hazard signs ESAT
The table below lists some of the common hazards signs that you may encounter. You
should know what all of these mean.Sign Symbol Meaning Sign Symbol MeaningC Corrosive. Chem-
icals with this la-
bel can burn your
skin and eyes and
burn holes in your
clothes. An exam-
ple is hydrochloric
acid.N Environmentally
harmful. Chemicals
with this label are
damaging to the
environment. An
example is CFC’s.continued on next page